Note: As an ISO tag is necessary to comply with IT standards. We chose a UNITAG for Arabic, thus usable in any country. ar-AA is the new tag. It is Classic Arabic.

In Joomla 3.x is a plugin called plg_system_languagecode that lets site administrators choose the tag that will display in the head of their pages for SEO purposes. It lets therefore use the ar-AA pack and change to ar_DZ, ar-SA, ar-DZ, ar-EG, ar-TN, etc.